Don't do it!!!!!
The W211 was born to have a plain grille with the bonnet star, not a great whopping Axor star!
I'll cry myself to sleep if you do it!!!
This was my plan should anyone helpfully removed my bonnet star - grille with badge, flat bonnet badge.
However, I understand the bonnet star is not that expensive so I may just replace like for like if that is the case...